Adam ernst



A. ERNST! I Heating Drum.

No. 55,554. I Patented June 5. 1557.

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ADAM sense, or MILWAUKEE, WISOQNSIN. Letters Patent No. 65,55l, datedJune 11,1861.

STOVE-PIPE DRUMS.

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TO WHOM IT MAY CONCERN:

Be it known that I, ADAM Enxs'niof Milwaukee, in the county ofMilwaukee, and State of Wisconsin, have invented certain new and usefulimprovements in Heating Apparatus; and Thereby declare the following tohe a full, clear, and exact description of the some, reference being badto the accompanying drawings, in whichv Figure 1 is a vertical centralsection of an apparatus constructed in accordance with my invention; and

Figure 2 is a like section of a modification of the same. i v

Figures 4 and 5 are transverse sections of the apparatus, shown in figs.1 and 2 respectively.

The object of my invention is to utilize the hcated product ofcombustion which in ordinary stoves is drawn off directly through achimney flue into the outside air. A great amount of heat is thus wastedwhich might be applied to heating other rooms or apartments, or to morethoroughly heating the apartment in which the furnace or stove islocated.

,My invention consists in a heating apparatus in which fines are formedfor the passage of the products of combustion and air to be heated inthe manner hereinafter described, and which is capable of being readilyapplied to or used in connection with stoves or furnaces of ordinaryconstruction.

Thisappuratus may be either attached to the stove itselfor placed at anypoint on the smoke pipe or flue, so that if the stove be in one room thepipe may extend through the wall into the next adjoining room, orthrough the ceiling into the room above, where the heating apparatus canbe connected or joined to the pipe so as to utilize all the heat passingup through it, and to thoroughlywarmthe'room. I

The apparatus consists of a drum or casing enclosing an outer helical orspiral flue, through which the smoke and heat pass from the stove whendesired. This annular flue encloses another flue (the two being entirelyseparate and having no communication with each other) which communicateswith the outside air. There may he alsi) a third due, if it be desired,either enclosed within the air flue or placed on one side of theapparatus, which is prorided withn damper or valve, and like theouter-helical due is intended to receive the products of combustion. v Vf When the apparatus is to be used for heating purposes the damper isturned so as to close this flue, which directs the products ofcombustion up through the outer winding passage, heating the air in theinner fine and at the same time causing the heat to radiate from theexterior of the drum. i

When no more he-fat is required, or it is desiredtodireot the heat toanother room still further on, the damper or valve above mentioned isopened, and the smoke and heat pass up through the straight or tubularfine, and are carried ed to the point where they are to be used. i i

In the drawings, I have represented twomodifications of my invention.The apparatus shown in fig. 1 is intended to he applied to the top of anordinary stove, or it may simply hare a fire-pot or chamber formed underit. It consists of an outer drum or casing, in which is formed a; spiralor helical flue, a, priclosing the air flue b. The two flues have nocommunication with each other. The air line is closed at the bottom, and

communicates with the exterior air by means of a tube, 6', whichpasses'through the helical fined and drum A; the flue a is of courseopen at the bottom to receive the heat, &c., from the fire, and at itsupper end opens into the side flue c, which is putin communication withthe lower part of theennular chamber surrounding the air flue I; bymeans hf the branch pipe 0. A. damper, d, is placed in the side flue, bymeans of which the products of combustion may be either drawn ofi'directly through this flue or directed into the helical fine or radiator01.

The operation of the apparatus is as follows: Whenthe damper d isclosed, the heated products of crimbustion, passing up through the openbottom ,of the chamber A, will be carried through the spiral or helicalflue a. In their course through this annular and spiral chamber theywill not only caluse the heat to radiate from the exterior drum A, butwill heat the air within the inner drum or flue b, which air becomingritrefied ascends, its place being supplied by the cold air drawn inthrough the pipe b. After passing up through the helical flue, theproducts of combustion pass out into the pipe 0, The heated air in thedue I) is discharged from the open mouth of the line, or is conductedoff to any desired point by meansiof additional-length of pipe fittedover the top of the flue. If it be now desired to put a stop to theheating of the air, the damper cl is Opened, in which case the productsof combustion will of course be drawn off in great part, if notaltogether, through the shorter and more direct flue or passage 0. Bythis means they are kept from'contact with the inner flue b and helicaldrum a, and can be conducted ofl rapidly and withoutany'cons'iderableloss of heat' to other rooms greqniring to be heated. In such caseapparatus may be employed similar to that shown in fig. 2, in which theupper and lower ends a of the drum or casing A are contracted so as .tofit the pipe to which they are applied. The relative positions andgeneral arrangement of the spiral flue a and air flue b are unchanged,but instead of placing the side flue c on the exter pr of the drum A itis placed within the air fiue, by which arrangement the apparatus isdivided up into three concentric chambers. The flue c, as in fig. 1, isprovided with a damper, d, by operating which, as before explained, theproducts of" combustion are either drawn up directly through the centreflue or directed into the helical flue or radiator. In order. to admitof the free dis- ,charge of the heated air the casing A is divided intotwo sections, the internal arrangement of which is the same, connectedby tubes or pipes f opening into the helical passage or flue in theupper and lower sections.

The inner or direct smoke flue 0 extends uninterruptedly from one end ofthe apparatus-to the other. Under this arrangement the annularair-chamber b is entirely open at the top, so that the air drawn inthrough the tube or throat b when heated is free to escapefiom theannular openings 6 at the top.

" It will be seen that in this modification the inner flue c is inreality theordinary smoke flue or pipe, surrounded as described by anannular air-chamber and helical flue. By connecting the helical flues bypipes f,

as represented, the heated products of combustion are not onlyenabled'to pass with facility from the lower section to the upper, but theexterior heating surface is considerably increased in area. v

It will be seenthat the two forms of apparatus, shown in illustration ofmy invention, are essentially the same in principle. They are eachprovided with a flue for carrying of the products of combustion with asgreat rapidity and as little loss of caloric as possible; and they havea helical passage through which the products of combustion pass moreslowly, .so as to give out or radiate a greater amount of heat. Thesetwo fines are connected in such manner that the heat may be directedeither wholly or partially through the one or the other according as agreater or less degree of heat is required, and they are arranged andcombined in a radiator or drum formed so as to admit of their readyapplication to any fire-pot, or stove, or pipe of ordinary construction.

Having described my invention and the manner in which the same is or maybe carried into effect, what I claim, and desire to secure by LettersPatent, is

1. The herein-described heating apparatus, the same consisting of a drumor radiator'capable of.being applied to a stove or pipe of ordinaryconstruction, and provided with fiues arranged substantially in themanner and for the purposes herein shown and specified. I

2. The combination and arrangement of the inner or direct smoke flue,and annular air-chamber surrounding the same, with the outer helicalflue or radiator, and the pipes or tubes for connecting the sectionsinto which the said flue is divided, substantially as herein described.

In testimony whereof Ihave signed my name to this specification beforetwo subscribing witnesses.

ADAM ERNST.

Witnesses:

F. W. Hunnnacsmr, D. L. KISSLING.

